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arXiv 2109.07261math.AG
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基于自同态的Shimura子簇

Shimura subvarieties via endomorphisms

Irene Spelta

摘要:

我们表明存在两个新的志村子品种的$\mathcal{A}_2, \mathcal{A}_3$一般包含在Torelli轨迹。他们提供的第一个例子志村子品种获得的雅可比携带非平凡的自同态不直接引起的自同构的曲线。我们还获得了一个新的例子志村变种的$\mathcal{A}_4$一般包含在Prym基因座。

英文摘要:

We show the existence of two new Shimura subvarieties of $\mathcal{A}_2, \mathcal{A}_3$ generically contained in the Torelli locus. They provide the first examples of Shimura subvarieties obtained by means of Jacobians carrying non-trivial endomorphisms not directly induced by the automorphisms of the curves. We also obtain a new example of a Shimura subvariety of $\mathcal{A}_4$ generically contained in the Prym locus.

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